Depending on where you live and the places you like to go, you may be required to show proof of your COVID-19 vaccination status.
Apple took a step towards making this easier with iOS 15. When this feature first rolled out I was kinda out of luck because Walgreens (the pharmacy where I got my shots) didn’t have support for digital vaccination cards. Oh well. I moved on and just used Clear to store my card. Not as convenient, but it was better than nothing. I figured one day pharmacies like Walgreens, CVS, etc. would get on board and there would be some big announcement when they do. Well, that wasn’t the case! Walgreens quietly added support that I just discovered.